No matter what you do you need to have your brain put on the final touch.
Any good aiming system will get you close to this position so there is less for the brain to figure it out.
Kind of like the low deflection shafts. Some swear at them and others swear by them.
The ones that swear at them don't know the difference and how to adjust to the different deflection.
What I teach with the aiming is probably not an aiming system but getting the dominant eye in the correct position and in turn the body and stroke will fall into place almost naturally with a few minor adjustments needed.
Like with a gun.
You have used the open sights for years. swear you would never use one of those stupid scopes.
Your buddy has one of those stupid scopes and shoots all the deer that I don't even try to aim at with the open sights.
You both use a system. It's just that your buddy that has the scope is much more successful. But until you could tell the difference first hand it was hard to imagine the difference.
This is kind of a cut and dried example.
There are many different aiming systems but only a couple that work at getting the eyes in the most dominant position.
If the dominant eye is not in the most, and I mean the most dominant position, the scope is out of line to begin with.
Perfect Aim is about showing a player where this most correct dominant position is so the brain is getting the most correct picture.
Think about it?
We all know when we get down and the shot doesn't look right that we will probably miss.
The key is LOOK RIGHT.....................
If it doesn't look right it's because the eyes are not positioned correctly.
This can be done manually very successfully.
The answer is both. But.....you can do so much to get close manually but it really needs to be learned.
Doing more manually, knowing how, is so huge.
The brain has too many things to do naturally.
If you know how to use a scope you can hit the target until your 150 years old.
Same with a pool shot. Just need to learn where that natural scope is.....